Contributions To The Geology Of Washington: Geology And Physiography Of Central Washington, Issues 16-19George Otis SmithUitverkochtHou mij op de hoogte
The Potomac River Basin; Geographic History--rainfall and Stream Flow--pollution, Typhoid Fever, and Character of Water--relation of Soils and ForestBailey WillisUitverkochtHou mij op de hoogte
Research In China ...: Pt. 1. Descriptive Topography And Geology, By Bailey Willis, Eliot Blackwelder, And R.h. Sargent. Pt. 2. Petrography ABailey WillisUitverkochtHou mij op de hoogte
